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ARS Home » Southeast Area » New Orleans, Louisiana » Southern Regional Research Center » Commodity Utilization Research » Research » Publications at this Location » Publication #253057

Title: Evaluation of Chitosan Coated Granular Activated Carbon for Treatment of Perchlorate-Contaminated Munitions Wastewater

item BODDU, VEERA - Us Army Research
item MALONEY, STEPHEN - Us Army Research
item VISWANATH, DABIR - University Of Missouri
item GHOSH, TUSHAR - University Of Missouri
item Uchimiya, Sophie

Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 5/12/2020
Publication Date: N/A
Citation: N/A

Interpretive Summary:

Technical Abstract: Wastewater from munitions formulation PAX 21 contains perchlorate and explosives such as RDX. A biosorbent was developed by coating chitosan (a glucosamine biopolymer) gel onto various support materials such as granular activated carbon, alumina, and perlite. The chitosan sorbents have high affinity for binding with both cationic and anionic species due to the protonated amines of the glucosamine and carboxylate moieties on the sorbent. Bench scale isothermal and column flow studies for sorption of perchlorate and PAX 21 wastewater were conducted with the chitosan coated granular activated carbon (CCGAC). With an influent perchlorate concentration of 1000 µg/L, the treated effluent perchlorate concentration was below the detection limit of 2 µg/L. Experiments with higher perchlorate concentrations (up to 120 mg/L) were also conducted. The biosorbent can be regenerated and used for more than 10 cycles depending on the influent perchlorate concentration and other water quality parameters.